package com.itheima.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.itheima.reggie.common.R;
import com.itheima.reggie.dto.DishDto;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.DishFlavor;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishFlavorService;
import com.itheima.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author ：sean
 * @date ：Created in 2022/4/19
 * @description ：
 * @version: 1.0
 */
@RestController
@Slf4j
@RequestMapping("/dish")
public class DishController {

	@Autowired
	private DishService dishService;

	@Autowired
	private CategoryService categoryService;

	@Autowired
	private DishFlavorService dishFlavorService;

	@Autowired
	private RedisTemplate redisTemplate;

	@PostMapping
	public R<String> save(@RequestBody DishDto dishDto){
		log.info(dishDto.toString());

		dishService.saveWithFlavor(dishDto);

//		//清理所有菜品的缓存数据
//		Set keys = redisTemplate.keys("dish_*");
//		redisTemplate.delete(keys);

		//清理某个分类下面的菜品缓存数据
		String key = "dish_"+dishDto.getCategoryId()+"_1";
		redisTemplate.delete(key);

		return R.success("新增菜品成功");
	}

	@GetMapping("/page")
	public R<Page> page(int page, int pageSize, String name){

		log.info("菜品分类--",page,pageSize,name);
		Page pageInfo = new Page(page,pageSize);
		LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
		dishLambdaQueryWrapper.like(StringUtils.isNotEmpty(name),Dish::getName,name);
		dishLambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);
		dishService.page(pageInfo,dishLambdaQueryWrapper);

		Page<DishDto> dishDtoPage  =new Page<>();
		BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
		List<Dish> records = pageInfo.getRecords();

		List<DishDto> dishDtoList = new ArrayList<>();
		for (Dish dish:records){
			DishDto dishDto = new DishDto();
			BeanUtils.copyProperties(dish,dishDto);
			Category category = categoryService.getById(dish.getCategoryId());
			dishDto.setCategoryName(category.getName());
			dishDtoList.add(dishDto);
		}

		dishDtoPage.setRecords(dishDtoList);
		return R.success(dishDtoPage);
	}

	@GetMapping("/{id}")
	public R<DishDto> get(@PathVariable Long id){
		DishDto dishDto = dishService.getByIdWithFlavor(id);
		if(dishDto != null){
			return R.success(dishDto);
		}else{
			return R.error("无对象");
		}
	}

	@PutMapping
	public R<String> update(@RequestBody DishDto dishDto){
		log.info("[更新:{}]",dishDto);
		dishService.updateWithFlavor(dishDto);

//		//清理所有菜品的缓存数据
//		Set keys = redisTemplate.keys("dish_*"); //获取所有以dish_xxx开头的key
//		redisTemplate.delete(keys); //删除这些key

		//清理某个分类下面的菜品数据
		String key = "dish_"+dishDto.getCategoryId()+"_1";
		redisTemplate.delete(key);
		return R.success("更新成功");
	}

	@GetMapping("/list")
	public R<List<DishDto>> list(Dish dish){

		// 从缓存读取列表数据
		List<DishDto> redisDtoList = null;
		String key = "dish_"+dish.getCategoryId()+"_"+dish.getStatus();
		redisDtoList = (List<DishDto>) redisTemplate.opsForValue().get(key);
		log.info("redisDtoList:{}", redisDtoList);
		if (redisDtoList != null) {
			log.info("[从缓存读取列表数据]");

			return R.success(redisDtoList);
		}
		//构造查询条件
		LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper<>();
		queryWrapper.eq(dish.getCategoryId() != null ,Dish::getCategoryId,dish.getCategoryId());
		//添加条件，查询状态为1（起售状态）的菜品
		queryWrapper.eq(Dish::getStatus,1);
		//添加排序条件
		queryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);

		List<Dish> list = dishService.list(queryWrapper);

		List<DishDto> dishDtoList = list.stream().map((item) -> {
			DishDto dishDto = new DishDto();
			BeanUtils.copyProperties(item,dishDto);

			Long categoryId = item.getCategoryId();//分类id
			//根据id查询分类对象
			Category category = categoryService.getById(categoryId);
			if(category != null){
				String categoryName = category.getName();
				dishDto.setCategoryName(categoryName);
			}

			//当前菜品的id
			Long dishId = item.getId();
			LambdaQueryWrapper<DishFlavor> lambdaQueryWrapper = new LambdaQueryWrapper<>();
			lambdaQueryWrapper.eq(DishFlavor::getDishId,dishId);
			//SQL:select * from dish_flavor where dish_id = ?
			List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrapper);
			dishDto.setFlavors(dishFlavorList);

			return dishDto;
		}).collect(Collectors.toList());

		//如果不存在，需要查询数据库，将查询到的菜品数据缓存到Redis
		redisTemplate.opsForValue().set(key,dishDtoList,60, TimeUnit.MINUTES);

		return R.success(dishDtoList);
	}
}
